Duct adaptor ring

Details Duct adaptor ring Duct adaptor ring

2010-01-24

2011-10-04

Nelson, T. Chase (Department: 2914)

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

Design Patent

active

D0646373

CLAIM:
The ornamental design for a duct adaptor ring, as shown and described.

REFERENCES:
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patent: 3983194 (1976-09-01), Richardson et al.
patent: D375558 (1996-11-01), Williams
patent: D446298 (2001-08-01), Thurman
patent: D466652 (2002-12-01), Thurman
patent: D504503 (2005-04-01), Thurman
patent: D521147 (2006-05-01), Sandman et al.
patent: D541405 (2007-04-01), Snyder
patent: D589126 (2009-03-01), Concannon
patent: D601180 (2009-09-01), Takeda
patent: D605748 (2009-12-01), Gammack et al.
patent: D612925 (2010-03-01), Kameyama et al.
patent: D614280 (2010-04-01), Dyson et al.

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